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Celebrating 50 years of Innovation in Science Education Photoelectric Effect System A Find Planck’s Constant to within 5% A Verify the stopping voltage is independent of intensity A Find photodiode characteristics A Use the optional 850 Universal Interface and PASCO Capstone ™ Software to collect and analyze the data. Product Information Photoelectric Effect System ....................................... SE-6609 Includes apparatus, power supply and amplifier. Items may also be purchased seperately: Basic Photoelectric Effect........................................... SE-6614 DC Current Amplifier .................................................. SE-6621 DC Power Supply I...................................................... SE-6615 Optional: 850 Universal Interface .............................................. UI-5000 PASCO Capstone Software Department License ................................................ UI-5406 (includes student home use) Single User License ................................................ UI-5401 The graph of stopping voltage versus frequency gives a slope of 4.2 x 10 -15 V·s. This results in a value for Planck’s Constant of 6.7 x 10 -34 J·s, which is 1.3% above the accepted value. Graph generated using PASCO Capstone Software and 850 Universal Interface. Aperture Selection Ring Filter Wheel The filters and the apertures are built into the front of the photodiode case, making it easy to keep clean and eliminating the need for a separate storage box. Component Specifications: DC Current Amplifier 10 -8 to 10 -13 A, in 6 ranges DC Power Supply I 0 to 6.3 V DC, 1 A maximum -4.5 to 0 V DC, 10 mA maximum -4.5 to 30 V DC, 10 mA maximum Photoelectric Tube Spectral Response Range: 300–700 nm Anode: nickel ring Optical Filters Five Filters with Central Wavelengths: 365.0, 404.7, 435.8, 546.1, and 577.0 nm
